| privileged | |
| privileged information(noun, expression, abstruseness, inscrutableness, rebus) | |
| probationary | |
| rebus(noun, abstruseness, inscrutableness) | |
| recondite | |
| remote(close, open) | |
| removed | |
| reputed | |
| rune(noun, abstruseness, inscrutableness, rebus) | |
| runes(noun, abstruseness, inscrutableness, rebus) | |
| shadowy | |
| skeleton in cupboard(noun, expression, idiom, abstruseness, inscrutableness) | |
| somber | |
| sombre | |
| some | |
| some other | |
| sphinx(noun, understanding, abstruseness, inscrutableness, rebus) | |
| stickling | |
| strange | |
| stumper(noun, understanding, abstruseness, inscrutableness, rebus) |
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| APA | Smart Define. (2015). known thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/known/thesaurus/antonyms |
| Chicago | Smart Define. 2015. "known thesaurus" https://smartdefine.org/known/thesaurus/antonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2015, known thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/known/thesaurus/antonyms>. |
| MLA | Smart Define. "known thesaurus" 14 April 2015. Web. 26 September 2026. <https://smartdefine.org/known/thesaurus/antonyms> |